Reenforced high-pressure float and process of manufacturing the same



March 16 1926.

G. w. OSBORN REENFORCED HIGH PRESSURE FLOAT 'AND PROCESS OF MANUFACTURING THE SAME Filed Feb. 13, 1925 INVENTOR.

ATTORNEY.

Patented Mar. 16, 1926.

earner orrice.

GEORGE w. osBoRn, or onnvnnann, OHIO.

REENFOROED HIGH-PRESSURE FLOAT AND ?ROCES$ OF MANUFACTURING THE SAME.

Application filed February To all whom it may concern:

Be it known that I, GEORGE W. OsnoRN, a citizen of the United States, and resident of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Reenforced High-Pressure Floats and Processes of Manufacturing the Same, of which I hereby declare the following to be a full, clear, and exact description, such as Will enable others skilled in the art to which it appertains to make and use the same.

i The objects ofthe invention are to provide reenforcing' means for sheet metal floats to adapt them to endure high pressure in steam or hot oil or in other liquids under high pressure.

In the manufacture of sheet metal floats it has been customary to CODSiDlLlCUthGlII of semi-spherical sheet metal parts formed of spun brass, steel or other metal, in which the crown of the semispherical part when spun receives the greatest amount of pressure and tooling when being constructed and the trimmed edges receive the least amount of tooling, and therefore the metal therein is not condensed and hardened to the samedegree, and therefore the central or semieircular part adjacent to the joint'or part of union is the weakest part of the float.

Also the wall of the float when composed of one integral sheet of metal, is placed under a uniform amount of pressure throughout and will not endure very high degrees of pressure.

I To avoid these objections and limitations in the efficiency of the walls of the float, the

improved wall is composed of laminations of sheet metal constructed by first spinning a. semispherical inner layer from a sheet of metal into perfectshape over a metal form or mold, and then using the first sheet as mold and spinning a second sheet thereover until the parts are closely fitted thereto, and continuously spinning further laminations thereover until the required thickness of wall is obtained. The circumferential edges of the cup shaped laminations are bevelled outwardly so'that when the semispherical portions are superimposed upon 13, 1925. Serial No. 2,922.

each other and are placed over the vertical ianges of the T shaped ring the inner laminations will engage with the horizontal flange of the ring on both sides thereof, and the edges of the remaining laminations will recede one by one from the horizontal flange leaving an annular V shaped recess on each side of said horizontal flange.

The parts of the edges of the laminations andof the flange of the ring enclosing the recess are then heated to a welding heat by means of an oxyacetylene or other welding flame and-the welding metal oralloy which may be of the same or similar material as that of the laminations is introduced and melted to unite with the walls of the cavity. In this manner the cavities are filled with molten metalwhieh integrally unites with the flange D and with the edges of the laminations and forms a dove-tail joint preventing the escape of any of the laminations that might become loosened from any cause such as a violent blow.

The outer edges of" the metal filling the (lavities are then connected with molten metal and an external crown or head formed circumferentially enclosing the float.

This method of supplying aband of weldedmaterial circumferentially about the float reenforcesthe float and also serves to 111- tegrally secure the free edges of the laminations-together. The rod to which the float is attached is secured thereto by means of a threaded connection with'a flanged plug or ferrule,all joints being welded in a similar manner, to be able to sustain high pressure.

The device is exemplified in the construction illustrated in the figures, where Fig. 1 is a longitudinal section of a spherical float. Fig. 2 illustrates an elongated float. Fig. 3 is a perspective of the reenforcing ring.

In these views, A, A A A A represent the several laminations of which the semispheres S, S are constructed. B, B, represent the inclined edges of the semispheres. C is the T shaped intermediate ring which is provided with the horizontal central rib D, that extends between the edges of the lami nations and the vertical portions of'this ring overlap the edges of the opposed inner laminations and reeni'oree the same, and l) is the crowned bead composed of welding metal that extends between the edges of the laminations and the rib D on each side thereof, and lills the annular and angular spaces l at the sides of said rib.

The end ol the rod G to which the float is attached is screw threaded and is inserted in the screw threaded opening H in the flanged plug or lei-rule I. The outer end of this plug is screw threaded at J and a nut or threaded washer ii. is screwed tightly thereorer, thus clamping the laminations tightly together.

lletore securing the edges of the semi-- cylinders together the edges of the flange K upon the inner end of the plug are welded in the same manner to the inner lamination and the nut washer is similarly welded to the projecting part of the plug and to the outer lamination. In this manne' all joints are hermetically sealed and the amount of pressure that the 'alls of the float are enabled to sustain is greatly increased by the multiple number of laminations, upon the principle that each lamination will absorb a large amount of pressure before the pressure. will extend to the next layer.

Haring described the invention, what I claim as new and desire to secure by Letters- .Patent is:

1. The hereinbeitorc described process of constructing a high pressure sheet metal float, consisting in forming two semispherical bodies by first spinning a pair of semispherical segments from sheet metal, and thereafter spinning and superimposing thereon similar semispherieal sheets of metal closely titted to the same and to each other, until a number of independent laminations hare been assembled, next bevelling outwardly the edges of the semis 'iherical portions in each sen'iisphere thus constructed when assembled together. approximating said edges of said pair of semispheres to gether and inserting the horizontal flange of a T shaped ring between them, introducing welding metal into the annular V shaped cavities thus formed between said edges and said flange and integrally uniting the same at a welding heat with said edges and with the sides of said flange.

Q. The hereinbelore described process of constructing a high pressure sheet metal float, consisting in forming two semispheri- =al bodies by iii-st spinning a pair of semispherical segments from sheet metal, and thereafter spinning and superii'nposing thereon similar semispherical sheets of metal closely titted to the same and to each other, unti a number of independent. laminations hare been assembled. next bevelling outwardly the edges of the semispherical portions in each semisphere thus constructed when assembled together, approximating said edges of said pair of semispheres togcther and inserting the horizontal flange of a T shaped ring between them, introducing welding metal into the annular V shaped cavities thus formed between said edges and said flange and integrally uniting the same at a welding heat with said edges and with the sides of said flange and finally forming an external annular crown or head by applying molten welding metal over the outer edge of said l'lange and uniting the same with the welding metal in said recesses.

I13. Bi laminated hollow sheet metal float com posed ol distinct sheet metal semispherical hollow bodies, each body being composed of an inner sen'iispherical sheet metal member, and closely litting outer sheet metal iaminations supt-a'imposed thereon, and a central reent'oroing ring provided with a horizcontal member against which the circumferential edges o't said laminations are opposed and means for integrally connecting said edges ol said lai'ninations and the cities of said horizontal member together.

at. A laminated hollow sheet metal float, composed of semisphcrical hollow bodies, each body being composed of an inner sen1ispherical sheet metal member and closely litting outer sheet metal laminations separately superimposed thereon, and a circumferential central reenforcing ring to which the edges of said laminations in said bodies are secured, said ring being provided with a central outwardly projecting flange pass ing between the edges of said segments, and also provided with lateral members overlapping the inner sides of said segments.

A laminated hollow sheet metal float, composed of semisphcrical hollow bodies, each body being composed of an inner semispherical sheet metal member and closely fitting outer sheet metal laminations superimposed thereon, and a central reenforcing ring to which the edges of said laminations in said bodies are secured, said ring being provided with a central outwardly projecting flange passing between the edges of said segments, and also provided with latc'al members overlapping the inner sides of said segments, and means for integrally connecting said ring to the edges of said segments.

A laminated hollow sheet metal float composed of SQIHlSlJllQTlGFtl hollow bodies, each body being composed ot an inner seinispherical sheet metal member and closely titling outer sheet metal lan'iinations superimposed thereon, and a central intermediate reenforcing ring and means for integrally securing said parts together.

7. A hollow sheet metal float composed'ol opposed pairs of distinct semispherical layers of sheet metal assembled together and an intermediate metal ring to which the opposed edges of the pairs of semispherical layers are welded.

8. In a laminated float, a float body composed of opposed portions, each portion comprising a multiple number of distinct layers of sheet metal superimposed upon each other, a ring; intermediate of the opposed edges of said body portions, the edges of said opposed laminations being outwardly bevelled to m'ovide V shaped annular re- GEORGE W. OSBORN. 

